#head-h1{
    color: white;
    text-align: center;
    margin: 0 auto;
}

#content-h1{
    color: black;
    width: 300px;
    height: 30px;
    text-align: center;
    margin: 0 auto;
}

.button {
    background-color: #4CAF50; /* Green */
    border: 1px solid #277de2;
    border-radius: 4px;
    color: white;
    padding: 10px 10px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 12px;
    margin: 4px 2px;
    -webkit-transition-duration: 0.4s; /* Safari */
    transition-duration: 0.4s;
    cursor: pointer;
}
.button1 {
    background-color: #4CAF50;
    color: white;
    border: 1px solid #4CAF50;
    width: 100%;
}
.button2_1 {
    background-color: #4CAF50;
    color: white;
    border: 1px solid #4CAF50;
    width: 20%;
    float: left;
}
.button2_2 {
    background-color: #4CAF50;
    color: white;
    border: 1px solid #4CAF50;
    width: 20%;
    float: left;
}
.button2_3 {
    background-color: #4CAF50;
    color: white;
    border: 1px solid #4CAF50;
    width: 20%;
    float: left;
}
.button2_4 {
    background-color: #4CAF50;
    color: white;
    border: 1px solid #4CAF50;
    width: 20%;
    float: left;
}


.button1:hover {
    background-color: white; 
    color: black; 
}
.button2_1:hover {
    background-color: white; 
    color: black; 
}
.button2_2:hover {
    background-color: white; 
    color: black; 
}
.button2_3:hover {
    background-color: white; 
    color: black; 
}
.button2_4:hover {
    background-color: white; 
    color: black; 
}

* {
    box-sizing: border-box;
}
.header, .footer {
    background-color: grey;
    color: white;
    padding: 1px;
    height: 10%;
}

.column {
    float: left;
    padding: 10px;
  }
  
.clearfix::after {
    content: "";
    clear: both;
    display: table;
  }
  
.menu {
    height: 600px;
    width: 40%;
}
  
.content {
    height: 500px;
    width: 60%;
}
 
html,body{
    width:100%;
    height:100%;
}

.menu_content{
    width:99%;
    height:0px;
    margin:0 auto;
    border:1px solid #dddddd;
    border-radius:2px;
    visibility: hidden;
    transition:height 0.5s linear;
    -webkit-transition:height 0.5s linear;
    -moz-transition:height 0.5s linear;
    -ms-transition:height 0.5s linear;
}

.text_content1{
    width:99%;
    height:300px;
    background-color: lightgoldenrodyellow;
    margin:0 auto;
    border:1px solid #dddddd;
    border-radius:2px;
    transition:height 0.5s linear;
    -webkit-transition:height 0.5s linear;
    -moz-transition:height 0.5s linear;
    -ms-transition:height 0.5s linear;
}

.text_content2{
    width:99%;
    height: 260px;
    background-color:mintcream;
    margin:0 auto;
    border:1px solid #dddddd;
    border-radius:2px;
    transition:height 0.5s linear;
    -webkit-transition:height 0.5s linear;
    -moz-transition:height 0.5s linear;
    -ms-transition:height 0.5s linear;
}

select {
    width: 100%;
    padding: 10px 10px;
    border: 1px solid #277de2;
    border-radius:4px;
    background-color: #f1f1f100;
}

#content_input{
    width: 100%;
}

input[type=text] {
    width: 100%;
    padding: 10px 10px;
    border: 1px solid #277de2;
    border-radius: 4px;
    background-color: #f1f1f1ad;
    box-sizing: border-box;
}

input[type=number] {
    width: 100%;
    padding: 10px 10px;
    border: 1px solid #277de2;
    border-radius: 4px;
    background-color: #f1f1f1ad;
    box-sizing: border-box;
}

table {
    margin-top: 1px;
    width: 100%;
    border: 1px solid #000;
    border-collapse: collapse;
}
table thead tr {
    background-color: #dddddd;
    color: black;
}

table td {
    text-align: center;
    font-size: 10px;
    tab-size: 10px;
    border:1px solid #000 ;
}
